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ISSUE
DRAWING NO.
DRAWING TITLE
DATE
Filename:
ECO No. DESCRIPTION OF CHANGE
L971C4.Sch
DV29 MAIN DAC L & R AUDIO
Contact Engineer:
L971C4
24-Aug-2004
INITIALS
Printed:
4 11Sheet of
Notes:
Contact Tel: (01223) 203270Peter Gaggs
A & R Cambridge Ltd.
Pembroke Avenue
Cambridge CB5 9QR
Waterbeach
A2
L400
120R@100MHz
+3V3A
C402
10UF
35V
SGET
C414
100N
50V
0805
+5VA
C400
10UF
35V
SGET
C406
100N
50V
0805
C407
100N
50V
0805
C408
100N
50V
0805
DGND
DGND
DGND
R416
10K
0W125
0805
+3V3_DAC0
+3V3_DAC0
C403
10UF
35V
SGET
C415
100N
50V
0805
C404
10UF
35V
SGET
C416
100N
50V
0805
DGND
ALRCLK_DAC0
ADAT_DAC0
ABCLK_DAC0
MCLK_DAC0
ALRCLK_DAC0
ADAT_DAC0
ABCLK_DAC0
MCLK_DAC0
MD
MC
ML_8740_0
MD
MC
ML_8740_0
DGND
+3V3_DAC0
RESET*
RESET*
R400
3K3
0W125
0805
C426
2N2
100V
FKP2
R402
3K3
0W125
0805
C430
680P
100V
FKP2
R408
680R
0W125
0805
R401
3K3
0W125
0805
C427
2N2
100V
FKP2
R409
680R
0W125
0805
R403
3K3
0W125
0805
C431
680P
100V
FKP2
6
5
7
IC400B
OPA2134UA
SO-8
DGND
DGND
2nd order Bessel filter, Av=1
C401
10UF
35V
SGET
C409
100N
50V
0805
C405
10UF
35V
SGET
C417
100N
50V
0805
+12VA
DGND
-12VA
DGND
R404
3K3
0W125
0805
C428
2N2
100V
FKP2
R406
3K3
0W125
0805
C432
680P
100V
FKP2
R410
680R
0W125
0805
R405
3K3
0W125
0805
C429
2N2
100V
FKP2
R411
680R
0W125
0805
R407
3K3
0W125
0805
C433
680P
100V
FKP2
2
3
1
84
IC400A
OPA2134UA
SO-8
DGND
DGND
2nd order Bessel filter, Av=1
DAC
FILTER
6
5
7
IC401B
OPA2134UA
SO-8
R413
10K
0W125
0805
R412
10K
0W125
0805
C410
100N
50V
0805
C411
100N
50V
0805
R422
1M0
0W125
0805
C434
33P
100V
0805
C436
100UF
16V
NONP
R424
47R
0W125
0805
R425
47R
0W125
0805
+12VA
DGND
-12VA
DGND
DGND
67
8
IC402B
DG413DY
SO-16
1011
9
IC402C
DG413DY
SO-16
1415
16
IC402D
DG413DY
SO-16
OUTPUT BUFFER
Gain of -2.2 for HDCD, otherwise -1.1
Cheapo version could have bipolar op-amp, but without feedback round coupling cap
GAIN_SCALING
GAIN_SCALING
R415
10K
0W125
0805
DGND
1=HDCD gain, 0=normal
2
3
1
84
IC401A
OPA2134UA
SO-8
R418
10K
0W125
0805
R417
10K
0W125
0805
R423
1M0
0W125
0805
C435
33P
100V
0805
C437
100UF
16V
NONP
R426
47R
0W125
0805
R427
47R
0W125
0805
DGND
2 3
1
IC402A
DG413DY
SO-16
C421
100N
50V
0805
C423
100N
50V
0805
C422
100N
50V
0805
V-
4
GND
5
V+
13
VL
12
IC402E
DG413DY
SO-16
+12VA
+5VA
-12VA
DGND
DGND
+12VA
-12VA
C440
1N0
100V
0805
+12VA
-12VA
C444
1N0
100V
0805
EMC_GND
RLY400A
NEC
EB2-5NU
DGND
DGND
DGND
RLY400B
NEC
EB2-5NU
DGND
RLY400C
NEC
EB2-5NU
+5VD
D404
BAS16
SOT-323
RLY500C
NEC
EB2-5NU
RLY600C
NEC
EB2-5NU
TR401
FMMT497
SOT-23
DGND
MUTE_BUF*
AC_PRES*
AC_PRES*
MUTE_BUF*
MUTING
R420
11K
0W125
0805
R421
11K
0W125
0805
Useful for drop-out test
D400
BAT54S
SOT-23
D403
BAT54S
SOT-23
R428
0R0 0W125
0805
R429
0R0
0805
R430
0R0 0W125
0805
R431
0R0
0805
R434
1K0
0W125
0805
R435
1K0
0W125
0805
SCART_LEFT
SCART_RIGHT
D401
BAT54S
SOT-23
R436
100R
0W125
0805
C441
1N0
100V
0805
DGND EMC_GND
1
2
CON400
HARWIN
M20-973
DGND
C442
1N0
100V
0805
C443
1N0
100V
0805
TR400
BC849B
SOT-23
DGND
R414
47K
0W125
0805
R419
47K
0W125
0805
NF
NF
P408
P409
P414
P415
P416
P417
P421
P423
P422
P424 P427
P428
P429
P430
P434
P431
P435
P436
P437
P438
ML/I2S
28
DVDD
8
DGND
7
LRCKIN
1
BCKIN
3
DIN
2
DIFFHW
6
SCLK
5
RSTB
22
VOUTL+
17
MODE8X
4
VOUTR+
12
MODE
24
AGNDL
19
ZERO
21
VOUTL-
16
VMIDL
18
VOUTR-
13
AVDDR
9
AGNDR
10
VMIDR
11
MC/DM1
27
CSBIOW
23
MUTEB
25
MD/DM0
26
AVDDL
20
AGND
14
AVDD
15
IC403
XWM8740EDS
SSOP-28
Audio outputs are inverted so as to be compatible with
DV88. This is compenstaed for in software by setting a
register in the DAC to invert the signal
Base resistor on sheet 3
Base resistor on PSU
Fit on top of RLY400
C412
100N
100V
MKS2
C413
100N
100V
MKS2
C424
47P
100V
0805
C425
47P
100V
0805
LEFT
RIGHT
SCRN
SKT400
KUNMING GOLD
DGND DGND
LEFT_OUT
RIGHT_OUT
C439
100P
100V
0805
C438
100P
100V
0805
C419
100P
100V
0805
C418
100P
100V
0805
P400
P401
P402
OUT_GND1OUT_GND2
ITEM400 1 Pad Damping 7.5x6x3MM RubberE828AP
PG 1.004_E121 09-08-04 Production release